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2eae6bdc AS |
1 | /* ced_ioc.c |
2 | ioctl part of the 1401 usb device driver for linux. | |
3 | Copyright (C) 2010 Cambridge Electronic Design Ltd | |
4 | Author Greg P Smith (greg@ced.co.uk) | |
5 | ||
6 | This program is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU General Public License | |
8 | as published by the Free Software Foundation; either version 2 | |
9 | of the License, or (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
19 | */ | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/errno.h> | |
2eae6bdc AS |
22 | #include <linux/slab.h> |
23 | #include <linux/module.h> | |
24 | #include <linux/kref.h> | |
25 | #include <linux/uaccess.h> | |
26 | #include <linux/usb.h> | |
27 | #include <linux/mutex.h> | |
28 | #include <linux/page-flags.h> | |
29 | #include <linux/pagemap.h> | |
30 | #include <linux/jiffies.h> | |
31 | ||
32 | #include "usb1401.h" | |
33 | ||
34 | /**************************************************************************** | |
35 | ** FlushOutBuff | |
36 | ** | |
37 | ** Empties the Output buffer and sets int lines. Used from user level only | |
38 | ****************************************************************************/ | |
631ae905 | 39 | static void FlushOutBuff(DEVICE_EXTENSION *pdx) |
2eae6bdc | 40 | { |
cd915200 GKH |
41 | dev_dbg(&pdx->interface->dev, "%s currentState=%d", __func__, |
42 | pdx->sCurrentState); | |
43 | if (pdx->sCurrentState == U14ERR_TIME) /* Do nothing if hardware in trouble */ | |
44 | return; | |
e4837704 EU |
45 | /* Kill off any pending I/O */ |
46 | /* CharSend_Cancel(pdx); */ | |
cd915200 GKH |
47 | spin_lock_irq(&pdx->charOutLock); |
48 | pdx->dwNumOutput = 0; | |
49 | pdx->dwOutBuffGet = 0; | |
50 | pdx->dwOutBuffPut = 0; | |
51 | spin_unlock_irq(&pdx->charOutLock); | |
2eae6bdc AS |
52 | } |
53 | ||
54 | /**************************************************************************** | |
55 | ** | |
56 | ** FlushInBuff | |
57 | ** | |
58 | ** Empties the input buffer and sets int lines | |
59 | ****************************************************************************/ | |
631ae905 | 60 | static void FlushInBuff(DEVICE_EXTENSION *pdx) |
2eae6bdc | 61 | { |
cd915200 GKH |
62 | dev_dbg(&pdx->interface->dev, "%s currentState=%d", __func__, |
63 | pdx->sCurrentState); | |
64 | if (pdx->sCurrentState == U14ERR_TIME) /* Do nothing if hardware in trouble */ | |
65 | return; | |
e4837704 EU |
66 | /* Kill off any pending I/O */ |
67 | /* CharRead_Cancel(pDevObject); */ | |
cd915200 GKH |
68 | spin_lock_irq(&pdx->charInLock); |
69 | pdx->dwNumInput = 0; | |
70 | pdx->dwInBuffGet = 0; | |
71 | pdx->dwInBuffPut = 0; | |
72 | spin_unlock_irq(&pdx->charInLock); | |
2eae6bdc AS |
73 | } |
74 | ||
75 | /**************************************************************************** | |
76 | ** PutChars | |
77 | ** | |
78 | ** Utility routine to copy chars into the output buffer and fire them off. | |
79 | ** called from user mode, holds charOutLock. | |
80 | ****************************************************************************/ | |
8a938c92 | 81 | static int PutChars(DEVICE_EXTENSION *pdx, const char *pCh, |
cd915200 | 82 | unsigned int uCount) |
2eae6bdc | 83 | { |
cd915200 | 84 | int iReturn; |
e4837704 | 85 | spin_lock_irq(&pdx->charOutLock); /* get the output spin lock */ |
cd915200 GKH |
86 | if ((OUTBUF_SZ - pdx->dwNumOutput) >= uCount) { |
87 | unsigned int u; | |
88 | for (u = 0; u < uCount; u++) { | |
89 | pdx->outputBuffer[pdx->dwOutBuffPut++] = pCh[u]; | |
90 | if (pdx->dwOutBuffPut >= OUTBUF_SZ) | |
91 | pdx->dwOutBuffPut = 0; | |
92 | } | |
93 | pdx->dwNumOutput += uCount; | |
94 | spin_unlock_irq(&pdx->charOutLock); | |
e4837704 | 95 | iReturn = SendChars(pdx); /* ...give a chance to transmit data */ |
cd915200 | 96 | } else { |
e4837704 | 97 | iReturn = U14ERR_NOOUT; /* no room at the out (ha-ha) */ |
cd915200 GKH |
98 | spin_unlock_irq(&pdx->charOutLock); |
99 | } | |
100 | return iReturn; | |
2eae6bdc AS |
101 | } |
102 | ||
103 | /***************************************************************************** | |
104 | ** Add the data in pData (local pointer) of length n to the output buffer, and | |
105 | ** trigger an output transfer if this is appropriate. User mode. | |
106 | ** Holds the io_mutex | |
107 | *****************************************************************************/ | |
8a938c92 | 108 | int SendString(DEVICE_EXTENSION *pdx, const char __user *pData, |
cd915200 | 109 | unsigned int n) |
2eae6bdc | 110 | { |
e4837704 EU |
111 | int iReturn = U14ERR_NOERROR; /* assume all will be well */ |
112 | char buffer[OUTBUF_SZ + 1]; /* space in our address space for characters */ | |
113 | if (n > OUTBUF_SZ) /* check space in local buffer... */ | |
114 | return U14ERR_NOOUT; /* ...too many characters */ | |
cd915200 | 115 | if (copy_from_user(buffer, pData, n)) |
74f56714 | 116 | return -EFAULT; |
e4837704 | 117 | buffer[n] = 0; /* terminate for debug purposes */ |
cd915200 | 118 | |
e4837704 | 119 | mutex_lock(&pdx->io_mutex); /* Protect disconnect from new i/o */ |
e035b590 | 120 | if (n > 0) { /* do nothing if nowt to do! */ |
cd915200 GKH |
121 | dev_dbg(&pdx->interface->dev, "%s n=%d>%s<", __func__, n, |
122 | buffer); | |
123 | iReturn = PutChars(pdx, buffer, n); | |
124 | } | |
125 | ||
e4837704 | 126 | Allowi(pdx); /* make sure we have input int */ |
cd915200 GKH |
127 | mutex_unlock(&pdx->io_mutex); |
128 | ||
129 | return iReturn; | |
2eae6bdc AS |
130 | } |
131 | ||
132 | /**************************************************************************** | |
133 | ** SendChar | |
134 | ** | |
135 | ** Sends a single character to the 1401. User mode, holds io_mutex. | |
136 | ****************************************************************************/ | |
8a938c92 | 137 | int SendChar(DEVICE_EXTENSION *pdx, char c) |
2eae6bdc | 138 | { |
cd915200 | 139 | int iReturn; |
e4837704 | 140 | mutex_lock(&pdx->io_mutex); /* Protect disconnect from new i/o */ |
cd915200 GKH |
141 | iReturn = PutChars(pdx, &c, 1); |
142 | dev_dbg(&pdx->interface->dev, "SendChar >%c< (0x%02x)", c, c); | |
e4837704 | 143 | Allowi(pdx); /* Make sure char reads are running */ |
cd915200 GKH |
144 | mutex_unlock(&pdx->io_mutex); |
145 | return iReturn; | |
2eae6bdc AS |
146 | } |
147 | ||
148 | /*************************************************************************** | |
149 | ** | |
150 | ** Get1401State | |
151 | ** | |
152 | ** Retrieves state information from the 1401, adjusts the 1401 state held | |
153 | ** in the device extension to indicate the current 1401 type. | |
154 | ** | |
155 | ** *state is updated with information about the 1401 state as returned by the | |
156 | ** 1401. The low byte is a code for what 1401 is doing: | |
157 | ** | |
158 | ** 0 normal 1401 operation | |
159 | ** 1 sending chars to host | |
160 | ** 2 sending block data to host | |
161 | ** 3 reading block data from host | |
162 | ** 4 sending an escape sequence to the host | |
163 | ** 0x80 1401 is executing self-test, in which case the upper word | |
164 | ** is the last error code seen (or zero for no new error). | |
165 | ** | |
166 | ** *error is updated with error information if a self-test error code | |
167 | ** is returned in the upper word of state. | |
168 | ** | |
169 | ** both state and error are set to -1 if there are comms problems, and | |
170 | ** to zero if there is a simple failure. | |
171 | ** | |
172 | ** return error code (U14ERR_NOERROR for OK) | |
173 | */ | |
8a938c92 | 174 | int Get1401State(DEVICE_EXTENSION *pdx, __u32 *state, __u32 *error) |
2eae6bdc | 175 | { |
cd915200 GKH |
176 | int nGot; |
177 | dev_dbg(&pdx->interface->dev, "Get1401State() entry"); | |
178 | ||
e4837704 | 179 | *state = 0xFFFFFFFF; /* Start off with invalid state */ |
cd915200 GKH |
180 | nGot = usb_control_msg(pdx->udev, usb_rcvctrlpipe(pdx->udev, 0), |
181 | GET_STATUS, (D_TO_H | VENDOR | DEVREQ), 0, 0, | |
182 | pdx->statBuf, sizeof(pdx->statBuf), HZ); | |
183 | if (nGot != sizeof(pdx->statBuf)) { | |
184 | dev_err(&pdx->interface->dev, | |
185 | "Get1401State() FAILED, return code %d", nGot); | |
e4837704 EU |
186 | pdx->sCurrentState = U14ERR_TIME; /* Indicate that things are very wrong indeed */ |
187 | *state = 0; /* Force status values to a known state */ | |
cd915200 GKH |
188 | *error = 0; |
189 | } else { | |
190 | int nDevice; | |
191 | dev_dbg(&pdx->interface->dev, | |
192 | "Get1401State() Success, state: 0x%x, 0x%x", | |
193 | pdx->statBuf[0], pdx->statBuf[1]); | |
194 | ||
e4837704 | 195 | *state = pdx->statBuf[0]; /* Return the state values to the calling code */ |
cd915200 GKH |
196 | *error = pdx->statBuf[1]; |
197 | ||
e4837704 | 198 | nDevice = pdx->udev->descriptor.bcdDevice >> 8; /* 1401 type code value */ |
e035b590 | 199 | switch (nDevice) { /* so we can clean up current state */ |
cd915200 GKH |
200 | case 0: |
201 | pdx->sCurrentState = U14ERR_U1401; | |
202 | break; | |
203 | ||
e4837704 | 204 | default: /* allow lots of device codes for future 1401s */ |
cd915200 GKH |
205 | if ((nDevice >= 1) && (nDevice <= 23)) |
206 | pdx->sCurrentState = (short)(nDevice + 6); | |
207 | else | |
208 | pdx->sCurrentState = U14ERR_ILL; | |
209 | break; | |
210 | } | |
211 | } | |
212 | ||
213 | return pdx->sCurrentState >= 0 ? U14ERR_NOERROR : pdx->sCurrentState; | |
2eae6bdc AS |
214 | } |
215 | ||
216 | /**************************************************************************** | |
217 | ** ReadWrite_Cancel | |
218 | ** | |
219 | ** Kills off staged read\write request from the USB if one is pending. | |
220 | ****************************************************************************/ | |
8a938c92 | 221 | int ReadWrite_Cancel(DEVICE_EXTENSION *pdx) |
2eae6bdc | 222 | { |
cd915200 GKH |
223 | dev_dbg(&pdx->interface->dev, "ReadWrite_Cancel entry %d", |
224 | pdx->bStagedUrbPending); | |
2eae6bdc | 225 | #ifdef NOT_WRITTEN_YET |
cd915200 GKH |
226 | int ntStatus = STATUS_SUCCESS; |
227 | bool bResult = false; | |
228 | unsigned int i; | |
e4837704 | 229 | /* We can fill this in when we know how we will implement the staged transfer stuff */ |
cd915200 GKH |
230 | spin_lock_irq(&pdx->stagedLock); |
231 | ||
e035b590 | 232 | if (pdx->bStagedUrbPending) { /* anything to be cancelled? May need more... */ |
cd915200 GKH |
233 | dev_info(&pdx->interface - dev, |
234 | "ReadWrite_Cancel about to cancel Urb"); | |
e4837704 EU |
235 | /* Clear the staging done flag */ |
236 | /* KeClearEvent(&pdx->StagingDoneEvent); */ | |
cd915200 GKH |
237 | USB_ASSERT(pdx->pStagedIrp != NULL); |
238 | ||
e4837704 EU |
239 | /* Release the spinlock first otherwise the completion routine may hang */ |
240 | /* on the spinlock while this function hands waiting for the event. */ | |
cd915200 | 241 | spin_unlock_irq(&pdx->stagedLock); |
e4837704 | 242 | bResult = IoCancelIrp(pdx->pStagedIrp); /* Actually do the cancel */ |
cd915200 GKH |
243 | if (bResult) { |
244 | LARGE_INTEGER timeout; | |
e4837704 | 245 | timeout.QuadPart = -10000000; /* Use a timeout of 1 second */ |
cd915200 GKH |
246 | dev_info(&pdx->interface - dev, |
247 | "ReadWrite_Cancel about to wait till done"); | |
248 | ntStatus = | |
249 | KeWaitForSingleObject(&pdx->StagingDoneEvent, | |
250 | Executive, KernelMode, FALSE, | |
251 | &timeout); | |
252 | } else { | |
253 | dev_info(&pdx->interface - dev, | |
254 | "ReadWrite_Cancel, cancellation failed"); | |
255 | ntStatus = U14ERR_FAIL; | |
256 | } | |
257 | USB_KdPrint(DBGLVL_DEFAULT, | |
258 | ("ReadWrite_Cancel ntStatus = 0x%x decimal %d\n", | |
259 | ntStatus, ntStatus)); | |
260 | } else | |
261 | spin_unlock_irq(&pdx->stagedLock); | |
262 | ||
263 | dev_info(&pdx->interface - dev, "ReadWrite_Cancel done"); | |
264 | return ntStatus; | |
2eae6bdc | 265 | #else |
cd915200 | 266 | return U14ERR_NOERROR; |
2eae6bdc AS |
267 | #endif |
268 | ||
269 | } | |
270 | ||
271 | /*************************************************************************** | |
272 | ** InSelfTest - utility to check in self test. Return 1 for ST, 0 for not or | |
273 | ** a -ve error code if we failed for some reason. | |
274 | ***************************************************************************/ | |
8a938c92 | 275 | static int InSelfTest(DEVICE_EXTENSION *pdx, unsigned int *pState) |
2eae6bdc | 276 | { |
cd915200 | 277 | unsigned int state, error; |
e4837704 EU |
278 | int iReturn = Get1401State(pdx, &state, &error); /* see if in self-test */ |
279 | if (iReturn == U14ERR_NOERROR) /* if all still OK */ | |
280 | iReturn = (state == (unsigned int)-1) || /* TX problem or... */ | |
281 | ((state & 0xff) == 0x80); /* ...self test */ | |
282 | *pState = state; /* return actual state */ | |
cd915200 | 283 | return iReturn; |
2eae6bdc AS |
284 | } |
285 | ||
286 | /*************************************************************************** | |
287 | ** Is1401 - ALWAYS CALLED HOLDING THE io_mutex | |
288 | ** | |
289 | ** Tests for the current state of the 1401. Sets sCurrentState: | |
290 | ** | |
291 | ** U14ERR_NOIF 1401 i/f card not installed (not done here) | |
292 | ** U14ERR_OFF 1401 apparently not switched on | |
293 | ** U14ERR_NC 1401 appears to be not connected | |
294 | ** U14ERR_ILL 1401 if it is there its not very well at all | |
295 | ** U14ERR_TIME 1401 appears OK, but doesn't communicate - very bad | |
296 | ** U14ERR_STD 1401 OK and ready for use | |
297 | ** U14ERR_PLUS 1401+ OK and ready for use | |
298 | ** U14ERR_U1401 Micro1401 OK and ready for use | |
299 | ** U14ERR_POWER Power1401 OK and ready for use | |
300 | ** U14ERR_U14012 Micro1401 mkII OK and ready for use | |
301 | ** | |
302 | ** Returns TRUE if a 1401 detected and OK, else FALSE | |
303 | ****************************************************************************/ | |
8a938c92 | 304 | bool Is1401(DEVICE_EXTENSION *pdx) |
2eae6bdc | 305 | { |
cd915200 GKH |
306 | int iReturn; |
307 | dev_dbg(&pdx->interface->dev, "%s", __func__); | |
308 | ||
e4837704 EU |
309 | ced_draw_down(pdx); /* wait for, then kill outstanding Urbs */ |
310 | FlushInBuff(pdx); /* Clear out input buffer & pipe */ | |
311 | FlushOutBuff(pdx); /* Clear output buffer & pipe */ | |
cd915200 | 312 | |
e4837704 EU |
313 | /* The next call returns 0 if OK, but has returned 1 in the past, meaning that */ |
314 | /* usb_unlock_device() is needed... now it always is */ | |
cd915200 GKH |
315 | iReturn = usb_lock_device_for_reset(pdx->udev, pdx->interface); |
316 | ||
e4837704 EU |
317 | /* release the io_mutex because if we don't, we will deadlock due to system */ |
318 | /* calls back into the driver. */ | |
319 | mutex_unlock(&pdx->io_mutex); /* locked, so we will not get system calls */ | |
e035b590 | 320 | if (iReturn >= 0) { /* if we failed */ |
e4837704 EU |
321 | iReturn = usb_reset_device(pdx->udev); /* try to do the reset */ |
322 | usb_unlock_device(pdx->udev); /* undo the lock */ | |
cd915200 GKH |
323 | } |
324 | ||
e4837704 EU |
325 | mutex_lock(&pdx->io_mutex); /* hold stuff off while we wait */ |
326 | pdx->dwDMAFlag = MODE_CHAR; /* Clear DMA mode flag regardless! */ | |
e035b590 | 327 | if (iReturn == 0) { /* if all is OK still */ |
cd915200 | 328 | unsigned int state; |
e4837704 | 329 | iReturn = InSelfTest(pdx, &state); /* see if likely in self test */ |
e035b590 | 330 | if (iReturn > 0) { /* do we need to wait for self-test? */ |
e4837704 | 331 | unsigned long ulTimeOut = jiffies + 30 * HZ; /* when to give up */ |
cd915200 | 332 | while ((iReturn > 0) && time_before(jiffies, ulTimeOut)) { |
e4837704 EU |
333 | schedule(); /* let other stuff run */ |
334 | iReturn = InSelfTest(pdx, &state); /* see if done yet */ | |
cd915200 GKH |
335 | } |
336 | } | |
337 | ||
e4837704 EU |
338 | if (iReturn == 0) /* if all is OK... */ |
339 | iReturn = state == 0; /* then success is that the state is 0 */ | |
cd915200 | 340 | } else |
e4837704 EU |
341 | iReturn = 0; /* we failed */ |
342 | pdx->bForceReset = false; /* Clear forced reset flag now */ | |
cd915200 GKH |
343 | |
344 | return iReturn > 0; | |
2eae6bdc AS |
345 | } |
346 | ||
347 | /**************************************************************************** | |
348 | ** QuickCheck - ALWAYS CALLED HOLDING THE io_mutex | |
349 | ** This is used to test for a 1401. It will try to do a quick check if all is | |
350 | ** OK, that is the 1401 was OK the last time it was asked, and there is no DMA | |
351 | ** in progress, and if the bTestBuff flag is set, the character buffers must be | |
352 | ** empty too. If the quick check shows that the state is still the same, then | |
353 | ** all is OK. | |
354 | ** | |
355 | ** If any of the above conditions are not met, or if the state or type of the | |
356 | ** 1401 has changed since the previous test, the full Is1401 test is done, but | |
357 | ** only if bCanReset is also TRUE. | |
358 | ** | |
359 | ** The return value is TRUE if a useable 1401 is found, FALSE if not | |
360 | */ | |
8a938c92 | 361 | bool QuickCheck(DEVICE_EXTENSION *pdx, bool bTestBuff, bool bCanReset) |
2eae6bdc | 362 | { |
e4837704 | 363 | bool bRet = false; /* assume it will fail and we will reset */ |
cd915200 GKH |
364 | bool bShortTest; |
365 | ||
e4837704 EU |
366 | bShortTest = ((pdx->dwDMAFlag == MODE_CHAR) && /* no DMA running */ |
367 | (!pdx->bForceReset) && /* Not had a real reset forced */ | |
368 | (pdx->sCurrentState >= U14ERR_STD)); /* No 1401 errors stored */ | |
cd915200 GKH |
369 | |
370 | dev_dbg(&pdx->interface->dev, | |
371 | "%s DMAFlag:%d, state:%d, force:%d, testBuff:%d, short:%d", | |
372 | __func__, pdx->dwDMAFlag, pdx->sCurrentState, pdx->bForceReset, | |
373 | bTestBuff, bShortTest); | |
374 | ||
e4837704 | 375 | if ((bTestBuff) && /* Buffer check requested, and... */ |
e035b590 | 376 | (pdx->dwNumInput || pdx->dwNumOutput)) { /* ...characters were in the buffer? */ |
e4837704 | 377 | bShortTest = false; /* Then do the full test */ |
cd915200 GKH |
378 | dev_dbg(&pdx->interface->dev, |
379 | "%s will reset as buffers not empty", __func__); | |
380 | } | |
381 | ||
e035b590 EU |
382 | if (bShortTest || !bCanReset) { /* Still OK to try the short test? */ |
383 | /* Always test if no reset - we want state update */ | |
cd915200 GKH |
384 | unsigned int state, error; |
385 | dev_dbg(&pdx->interface->dev, "%s->Get1401State", __func__); | |
e035b590 | 386 | if (Get1401State(pdx, &state, &error) == U14ERR_NOERROR) { /* Check on the 1401 state */ |
e4837704 EU |
387 | if ((state & 0xFF) == 0) /* If call worked, check the status value */ |
388 | bRet = true; /* If that was zero, all is OK, no reset needed */ | |
cd915200 GKH |
389 | } |
390 | } | |
391 | ||
e035b590 | 392 | if (!bRet && bCanReset) { /* If all not OK, then */ |
cd915200 GKH |
393 | dev_info(&pdx->interface->dev, "%s->Is1401 %d %d %d %d", |
394 | __func__, bShortTest, pdx->sCurrentState, bTestBuff, | |
395 | pdx->bForceReset); | |
e4837704 | 396 | bRet = Is1401(pdx); /* do full test */ |
cd915200 GKH |
397 | } |
398 | ||
399 | return bRet; | |
2eae6bdc AS |
400 | } |
401 | ||
402 | /**************************************************************************** | |
403 | ** Reset1401 | |
404 | ** | |
405 | ** Resets the 1401 and empties the i/o buffers | |
406 | *****************************************************************************/ | |
8a938c92 | 407 | int Reset1401(DEVICE_EXTENSION *pdx) |
2eae6bdc | 408 | { |
e4837704 | 409 | mutex_lock(&pdx->io_mutex); /* Protect disconnect from new i/o */ |
cd915200 | 410 | dev_dbg(&pdx->interface->dev, "ABout to call QuickCheck"); |
e4837704 | 411 | QuickCheck(pdx, true, true); /* Check 1401, reset if not OK */ |
cd915200 GKH |
412 | mutex_unlock(&pdx->io_mutex); |
413 | return U14ERR_NOERROR; | |
2eae6bdc AS |
414 | } |
415 | ||
416 | /**************************************************************************** | |
417 | ** GetChar | |
418 | ** | |
419 | ** Gets a single character from the 1401 | |
420 | ****************************************************************************/ | |
8a938c92 | 421 | int GetChar(DEVICE_EXTENSION *pdx) |
2eae6bdc | 422 | { |
e4837704 EU |
423 | int iReturn = U14ERR_NOIN; /* assume we will get nothing */ |
424 | mutex_lock(&pdx->io_mutex); /* Protect disconnect from new i/o */ | |
cd915200 GKH |
425 | |
426 | dev_dbg(&pdx->interface->dev, "GetChar"); | |
427 | ||
e4837704 EU |
428 | Allowi(pdx); /* Make sure char reads are running */ |
429 | SendChars(pdx); /* and send any buffered chars */ | |
cd915200 GKH |
430 | |
431 | spin_lock_irq(&pdx->charInLock); | |
e035b590 | 432 | if (pdx->dwNumInput > 0) { /* worth looking */ |
cd915200 GKH |
433 | iReturn = pdx->inputBuffer[pdx->dwInBuffGet++]; |
434 | if (pdx->dwInBuffGet >= INBUF_SZ) | |
435 | pdx->dwInBuffGet = 0; | |
436 | pdx->dwNumInput--; | |
437 | } else | |
e4837704 | 438 | iReturn = U14ERR_NOIN; /* no input data to read */ |
cd915200 GKH |
439 | spin_unlock_irq(&pdx->charInLock); |
440 | ||
e4837704 | 441 | Allowi(pdx); /* Make sure char reads are running */ |
cd915200 | 442 | |
e4837704 | 443 | mutex_unlock(&pdx->io_mutex); /* Protect disconnect from new i/o */ |
cd915200 | 444 | return iReturn; |
2eae6bdc AS |
445 | } |
446 | ||
447 | /**************************************************************************** | |
448 | ** GetString | |
449 | ** | |
450 | ** Gets a string from the 1401. Returns chars up to the next CR or when | |
451 | ** there are no more to read or nowhere to put them. CR is translated to | |
452 | ** 0 and counted as a character. If the string does not end in a 0, we will | |
453 | ** add one, if there is room, but it is not counted as a character. | |
454 | ** | |
455 | ** returns the count of characters (including the terminator, or 0 if none | |
456 | ** or a negative error code. | |
457 | ****************************************************************************/ | |
8a938c92 | 458 | int GetString(DEVICE_EXTENSION *pdx, char __user *pUser, int n) |
2eae6bdc | 459 | { |
e4837704 | 460 | int nAvailable; /* character in the buffer */ |
cd915200 GKH |
461 | int iReturn = U14ERR_NOIN; |
462 | if (n <= 0) | |
463 | return -ENOMEM; | |
464 | ||
e4837704 EU |
465 | mutex_lock(&pdx->io_mutex); /* Protect disconnect from new i/o */ |
466 | Allowi(pdx); /* Make sure char reads are running */ | |
467 | SendChars(pdx); /* and send any buffered chars */ | |
cd915200 GKH |
468 | |
469 | spin_lock_irq(&pdx->charInLock); | |
e4837704 EU |
470 | nAvailable = pdx->dwNumInput; /* characters available now */ |
471 | if (nAvailable > n) /* read max of space in pUser... */ | |
472 | nAvailable = n; /* ...or input characters */ | |
cd915200 | 473 | |
e035b590 | 474 | if (nAvailable > 0) { /* worth looking? */ |
e4837704 | 475 | char buffer[INBUF_SZ + 1]; /* space for a linear copy of data */ |
cd915200 | 476 | int nGot = 0; |
e4837704 | 477 | int nCopyToUser; /* number to copy to user */ |
cd915200 GKH |
478 | char cData; |
479 | do { | |
480 | cData = pdx->inputBuffer[pdx->dwInBuffGet++]; | |
e4837704 | 481 | if (cData == CR_CHAR) /* replace CR with zero */ |
cd915200 GKH |
482 | cData = (char)0; |
483 | ||
484 | if (pdx->dwInBuffGet >= INBUF_SZ) | |
e4837704 | 485 | pdx->dwInBuffGet = 0; /* wrap buffer pointer */ |
cd915200 | 486 | |
e4837704 | 487 | buffer[nGot++] = cData; /* save the output */ |
e035b590 | 488 | } while ((nGot < nAvailable) && cData); |
cd915200 | 489 | |
e4837704 | 490 | nCopyToUser = nGot; /* what to copy... */ |
e035b590 | 491 | if (cData) { /* do we need null */ |
e4837704 EU |
492 | buffer[nGot] = (char)0; /* make it tidy */ |
493 | if (nGot < n) /* if space in user buffer... */ | |
494 | ++nCopyToUser; /* ...copy the 0 as well. */ | |
cd915200 GKH |
495 | } |
496 | ||
497 | pdx->dwNumInput -= nGot; | |
498 | spin_unlock_irq(&pdx->charInLock); | |
499 | ||
500 | dev_dbg(&pdx->interface->dev, | |
501 | "GetString read %d characters >%s<", nGot, buffer); | |
74f56714 GKH |
502 | if (copy_to_user(pUser, buffer, nCopyToUser)) |
503 | iReturn = -EFAULT; | |
504 | else | |
e4837704 | 505 | iReturn = nGot; /* report characters read */ |
cd915200 GKH |
506 | } else |
507 | spin_unlock_irq(&pdx->charInLock); | |
508 | ||
e4837704 EU |
509 | Allowi(pdx); /* Make sure char reads are running */ |
510 | mutex_unlock(&pdx->io_mutex); /* Protect disconnect from new i/o */ | |
cd915200 GKH |
511 | |
512 | return iReturn; | |
2eae6bdc AS |
513 | } |
514 | ||
515 | /******************************************************************************* | |
516 | ** Get count of characters in the inout buffer. | |
517 | *******************************************************************************/ | |
8a938c92 | 518 | int Stat1401(DEVICE_EXTENSION *pdx) |
2eae6bdc | 519 | { |
cd915200 | 520 | int iReturn; |
e4837704 EU |
521 | mutex_lock(&pdx->io_mutex); /* Protect disconnect from new i/o */ |
522 | Allowi(pdx); /* make sure we allow pending chars */ | |
523 | SendChars(pdx); /* in both directions */ | |
524 | iReturn = pdx->dwNumInput; /* no lock as single read */ | |
525 | mutex_unlock(&pdx->io_mutex); /* Protect disconnect from new i/o */ | |
cd915200 | 526 | return iReturn; |
2eae6bdc AS |
527 | } |
528 | ||
529 | /**************************************************************************** | |
530 | ** LineCount | |
531 | ** | |
532 | ** Returns the number of newline chars in the buffer. There is no need for | |
533 | ** any fancy interlocks as we only read the interrupt routine data, and the | |
534 | ** system is arranged so nothing can be destroyed. | |
535 | ****************************************************************************/ | |
8a938c92 | 536 | int LineCount(DEVICE_EXTENSION *pdx) |
2eae6bdc | 537 | { |
e4837704 | 538 | int iReturn = 0; /* will be count of line ends */ |
cd915200 | 539 | |
e4837704 EU |
540 | mutex_lock(&pdx->io_mutex); /* Protect disconnect from new i/o */ |
541 | Allowi(pdx); /* Make sure char reads are running */ | |
542 | SendChars(pdx); /* and send any buffered chars */ | |
543 | spin_lock_irq(&pdx->charInLock); /* Get protection */ | |
cd915200 | 544 | |
e035b590 | 545 | if (pdx->dwNumInput > 0) { /* worth looking? */ |
e4837704 EU |
546 | unsigned int dwIndex = pdx->dwInBuffGet; /* start at first available */ |
547 | unsigned int dwEnd = pdx->dwInBuffPut; /* Position for search end */ | |
cd915200 GKH |
548 | do { |
549 | if (pdx->inputBuffer[dwIndex++] == CR_CHAR) | |
e4837704 | 550 | ++iReturn; /* inc count if CR */ |
cd915200 | 551 | |
e4837704 | 552 | if (dwIndex >= INBUF_SZ) /* see if we fall off buff */ |
cd915200 | 553 | dwIndex = 0; |
e035b590 | 554 | } while (dwIndex != dwEnd); /* go to last available */ |
cd915200 GKH |
555 | } |
556 | ||
557 | spin_unlock_irq(&pdx->charInLock); | |
558 | dev_dbg(&pdx->interface->dev, "LineCount returned %d", iReturn); | |
e4837704 | 559 | mutex_unlock(&pdx->io_mutex); /* Protect disconnect from new i/o */ |
cd915200 | 560 | return iReturn; |
2eae6bdc AS |
561 | } |
562 | ||
563 | /**************************************************************************** | |
564 | ** GetOutBufSpace | |
565 | ** | |
566 | ** Gets the space in the output buffer. Called from user code. | |
567 | *****************************************************************************/ | |
8a938c92 | 568 | int GetOutBufSpace(DEVICE_EXTENSION *pdx) |
2eae6bdc | 569 | { |
cd915200 | 570 | int iReturn; |
e4837704 EU |
571 | mutex_lock(&pdx->io_mutex); /* Protect disconnect from new i/o */ |
572 | SendChars(pdx); /* send any buffered chars */ | |
573 | iReturn = (int)(OUTBUF_SZ - pdx->dwNumOutput); /* no lock needed for single read */ | |
cd915200 | 574 | dev_dbg(&pdx->interface->dev, "OutBufSpace %d", iReturn); |
e4837704 | 575 | mutex_unlock(&pdx->io_mutex); /* Protect disconnect from new i/o */ |
cd915200 | 576 | return iReturn; |
2eae6bdc AS |
577 | } |
578 | ||
579 | /**************************************************************************** | |
580 | ** | |
581 | ** ClearArea | |
582 | ** | |
583 | ** Clears up a transfer area. This is always called in the context of a user | |
584 | ** request, never from a call-back. | |
585 | ****************************************************************************/ | |
8a938c92 | 586 | int ClearArea(DEVICE_EXTENSION *pdx, int nArea) |
2eae6bdc | 587 | { |
cd915200 GKH |
588 | int iReturn = U14ERR_NOERROR; |
589 | ||
590 | if ((nArea < 0) || (nArea >= MAX_TRANSAREAS)) { | |
591 | iReturn = U14ERR_BADAREA; | |
592 | dev_err(&pdx->interface->dev, "%s Attempt to clear area %d", | |
593 | __func__, nArea); | |
594 | } else { | |
e4837704 EU |
595 | TRANSAREA *pTA = &pdx->rTransDef[nArea]; /* to save typing */ |
596 | if (!pTA->bUsed) /* if not used... */ | |
597 | iReturn = U14ERR_NOTSET; /* ...nothing to be done */ | |
cd915200 | 598 | else { |
e4837704 EU |
599 | /* We must save the memory we return as we shouldn't mess with memory while */ |
600 | /* holding a spin lock. */ | |
6e3fe5dc | 601 | struct page **pPages = NULL; /*save page address list*/ |
e4837704 | 602 | int nPages = 0; /* and number of pages */ |
cd915200 GKH |
603 | int np; |
604 | ||
605 | dev_dbg(&pdx->interface->dev, "%s area %d", __func__, | |
606 | nArea); | |
607 | spin_lock_irq(&pdx->stagedLock); | |
608 | if ((pdx->StagedId == nArea) | |
609 | && (pdx->dwDMAFlag > MODE_CHAR)) { | |
e4837704 | 610 | iReturn = U14ERR_UNLOCKFAIL; /* cannot delete as in use */ |
cd915200 GKH |
611 | dev_err(&pdx->interface->dev, |
612 | "%s call on area %d while active", | |
613 | __func__, nArea); | |
614 | } else { | |
e4837704 EU |
615 | pPages = pTA->pPages; /* save page address list */ |
616 | nPages = pTA->nPages; /* and page count */ | |
617 | if (pTA->dwEventSz) /* if events flagging in use */ | |
618 | wake_up_interruptible(&pTA->wqEvent); /* release anything that was waiting */ | |
cd915200 GKH |
619 | |
620 | if (pdx->bXFerWaiting | |
621 | && (pdx->rDMAInfo.wIdent == nArea)) | |
e4837704 | 622 | pdx->bXFerWaiting = false; /* Cannot have pending xfer if area cleared */ |
cd915200 | 623 | |
e4837704 EU |
624 | /* Clean out the TRANSAREA except for the wait queue, which is at the end */ |
625 | /* This sets bUsed to false and dwEventSz to 0 to say area not used and no events. */ | |
cd915200 GKH |
626 | memset(pTA, 0, |
627 | sizeof(TRANSAREA) - | |
628 | sizeof(wait_queue_head_t)); | |
629 | } | |
630 | spin_unlock_irq(&pdx->stagedLock); | |
631 | ||
91f9765d | 632 | if (pPages) { /* if we decided to release the memory */ |
e4837704 EU |
633 | /* Now we must undo the pinning down of the pages. We will assume the worst and mark */ |
634 | /* all the pages as dirty. Don't be tempted to move this up above as you must not be */ | |
635 | /* holding a spin lock to do this stuff as it is not atomic. */ | |
cd915200 GKH |
636 | dev_dbg(&pdx->interface->dev, "%s nPages=%d", |
637 | __func__, nPages); | |
638 | ||
639 | for (np = 0; np < nPages; ++np) { | |
640 | if (pPages[np]) { | |
641 | SetPageDirty(pPages[np]); | |
642 | page_cache_release(pPages[np]); | |
643 | } | |
644 | } | |
645 | ||
646 | kfree(pPages); | |
647 | dev_dbg(&pdx->interface->dev, | |
648 | "%s kfree(pPages) done", __func__); | |
649 | } | |
650 | } | |
651 | } | |
652 | ||
653 | return iReturn; | |
2eae6bdc AS |
654 | } |
655 | ||
656 | /**************************************************************************** | |
657 | ** SetArea | |
658 | ** | |
659 | ** Sets up a transfer area - the functional part. Called by both | |
660 | ** SetTransfer and SetCircular. | |
661 | ****************************************************************************/ | |
8a938c92 | 662 | static int SetArea(DEVICE_EXTENSION *pdx, int nArea, char __user *puBuf, |
cd915200 | 663 | unsigned int dwLength, bool bCircular, bool bCircToHost) |
2eae6bdc | 664 | { |
e4837704 EU |
665 | /* Start by working out the page aligned start of the area and the size */ |
666 | /* of the area in pages, allowing for the start not being aligned and the */ | |
667 | /* end needing to be rounded up to a page boundary. */ | |
cd915200 GKH |
668 | unsigned long ulStart = ((unsigned long)puBuf) & PAGE_MASK; |
669 | unsigned int ulOffset = ((unsigned long)puBuf) & (PAGE_SIZE - 1); | |
670 | int len = (dwLength + ulOffset + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
671 | ||
e4837704 | 672 | TRANSAREA *pTA = &pdx->rTransDef[nArea]; /* to save typing */ |
6e3fe5dc | 673 | struct page **pPages = NULL; /* space for page tables */ |
e4837704 | 674 | int nPages = 0; /* and number of pages */ |
cd915200 | 675 | |
e4837704 EU |
676 | int iReturn = ClearArea(pdx, nArea); /* see if OK to use this area */ |
677 | if ((iReturn != U14ERR_NOTSET) && /* if not area unused and... */ | |
678 | (iReturn != U14ERR_NOERROR)) /* ...not all OK, then... */ | |
679 | return iReturn; /* ...we cannot use this area */ | |
cd915200 | 680 | |
e4837704 EU |
681 | if (!access_ok(VERIFY_WRITE, puBuf, dwLength)) /* if we cannot access the memory... */ |
682 | return -EFAULT; /* ...then we are done */ | |
cd915200 | 683 | |
e4837704 | 684 | /* Now allocate space to hold the page pointer and virtual address pointer tables */ |
e6c5abf2 | 685 | pPages = kmalloc(len * sizeof(struct page *), GFP_KERNEL); |
cd915200 GKH |
686 | if (!pPages) { |
687 | iReturn = U14ERR_NOMEMORY; | |
688 | goto error; | |
689 | } | |
690 | dev_dbg(&pdx->interface->dev, "%s %p, length=%06x, circular %d", | |
691 | __func__, puBuf, dwLength, bCircular); | |
692 | ||
e4837704 | 693 | /* To pin down user pages we must first acquire the mapping semaphore. */ |
f4ee2ccb | 694 | nPages = get_user_pages_fast(ulStart, len, 1, pPages); |
cd915200 GKH |
695 | dev_dbg(&pdx->interface->dev, "%s nPages = %d", __func__, nPages); |
696 | ||
e035b590 | 697 | if (nPages > 0) { /* if we succeeded */ |
e4837704 EU |
698 | /* If you are tempted to use page_address (form LDD3), forget it. You MUST use */ |
699 | /* kmap() or kmap_atomic() to get a virtual address. page_address will give you */ | |
700 | /* (null) or at least it does in this context with an x86 machine. */ | |
cd915200 | 701 | spin_lock_irq(&pdx->stagedLock); |
e4837704 EU |
702 | pTA->lpvBuff = puBuf; /* keep start of region (user address) */ |
703 | pTA->dwBaseOffset = ulOffset; /* save offset in first page to start of xfer */ | |
704 | pTA->dwLength = dwLength; /* Size if the region in bytes */ | |
705 | pTA->pPages = pPages; /* list of pages that are used by buffer */ | |
706 | pTA->nPages = nPages; /* number of pages */ | |
cd915200 GKH |
707 | |
708 | pTA->bCircular = bCircular; | |
709 | pTA->bCircToHost = bCircToHost; | |
710 | ||
711 | pTA->aBlocks[0].dwOffset = 0; | |
712 | pTA->aBlocks[0].dwSize = 0; | |
713 | pTA->aBlocks[1].dwOffset = 0; | |
714 | pTA->aBlocks[1].dwSize = 0; | |
e4837704 | 715 | pTA->bUsed = true; /* This is now a used block */ |
cd915200 GKH |
716 | |
717 | spin_unlock_irq(&pdx->stagedLock); | |
e4837704 | 718 | iReturn = U14ERR_NOERROR; /* say all was well */ |
cd915200 GKH |
719 | } else { |
720 | iReturn = U14ERR_LOCKFAIL; | |
721 | goto error; | |
722 | } | |
723 | ||
724 | return iReturn; | |
2eae6bdc AS |
725 | |
726 | error: | |
cd915200 GKH |
727 | kfree(pPages); |
728 | return iReturn; | |
2eae6bdc AS |
729 | } |
730 | ||
731 | /**************************************************************************** | |
732 | ** SetTransfer | |
733 | ** | |
734 | ** Sets up a transfer area record. If the area is already set, we attempt to | |
735 | ** unset it. Unsetting will fail if the area is booked, and a transfer to that | |
736 | ** area is in progress. Otherwise, we will release the area and re-assign it. | |
737 | ****************************************************************************/ | |
8a938c92 | 738 | int SetTransfer(DEVICE_EXTENSION *pdx, TRANSFERDESC __user *pTD) |
2eae6bdc | 739 | { |
cd915200 GKH |
740 | int iReturn; |
741 | TRANSFERDESC td; | |
74f56714 GKH |
742 | |
743 | if (copy_from_user(&td, pTD, sizeof(td))) | |
744 | return -EFAULT; | |
745 | ||
cd915200 GKH |
746 | mutex_lock(&pdx->io_mutex); |
747 | dev_dbg(&pdx->interface->dev, "%s area:%d, size:%08x", __func__, | |
748 | td.wAreaNum, td.dwLength); | |
e4837704 EU |
749 | /* The strange cast is done so that we don't get warnings in 32-bit linux about the size of the */ |
750 | /* pointer. The pointer is always passed as a 64-bit object so that we don't have problems using */ | |
751 | /* a 32-bit program on a 64-bit system. unsigned long is 64-bits on a 64-bit system. */ | |
cd915200 GKH |
752 | iReturn = |
753 | SetArea(pdx, td.wAreaNum, | |
754 | (char __user *)((unsigned long)td.lpvBuff), td.dwLength, | |
755 | false, false); | |
756 | mutex_unlock(&pdx->io_mutex); | |
757 | return iReturn; | |
2eae6bdc AS |
758 | } |
759 | ||
760 | /**************************************************************************** | |
761 | ** UnSetTransfer | |
762 | ** Erases a transfer area record | |
763 | ****************************************************************************/ | |
8a938c92 | 764 | int UnsetTransfer(DEVICE_EXTENSION *pdx, int nArea) |
2eae6bdc | 765 | { |
cd915200 GKH |
766 | int iReturn; |
767 | mutex_lock(&pdx->io_mutex); | |
768 | iReturn = ClearArea(pdx, nArea); | |
769 | mutex_unlock(&pdx->io_mutex); | |
770 | return iReturn; | |
2eae6bdc AS |
771 | } |
772 | ||
773 | /**************************************************************************** | |
774 | ** SetEvent | |
775 | ** Creates an event that we can test for based on a transfer to/from an area. | |
776 | ** The area must be setup for a transfer. We attempt to simulate the Windows | |
777 | ** driver behavior for events (as we don't actually use them), which is to | |
778 | ** pretend that whatever the user asked for was achieved, so we return 1 if | |
779 | ** try to create one, and 0 if they ask to remove (assuming all else was OK). | |
780 | ****************************************************************************/ | |
8a938c92 | 781 | int SetEvent(DEVICE_EXTENSION *pdx, TRANSFEREVENT __user *pTE) |
2eae6bdc | 782 | { |
cd915200 GKH |
783 | int iReturn = U14ERR_NOERROR; |
784 | TRANSFEREVENT te; | |
74f56714 | 785 | |
e4837704 | 786 | /* get a local copy of the data */ |
74f56714 GKH |
787 | if (copy_from_user(&te, pTE, sizeof(te))) |
788 | return -EFAULT; | |
789 | ||
e4837704 | 790 | if (te.wAreaNum >= MAX_TRANSAREAS) /* the area must exist */ |
cd915200 GKH |
791 | return U14ERR_BADAREA; |
792 | else { | |
793 | TRANSAREA *pTA = &pdx->rTransDef[te.wAreaNum]; | |
e4837704 | 794 | mutex_lock(&pdx->io_mutex); /* make sure we have no competitor */ |
cd915200 | 795 | spin_lock_irq(&pdx->stagedLock); |
e035b590 | 796 | if (pTA->bUsed) { /* area must be in use */ |
e4837704 EU |
797 | pTA->dwEventSt = te.dwStart; /* set area regions */ |
798 | pTA->dwEventSz = te.dwLength; /* set size (0 cancels it) */ | |
799 | pTA->bEventToHost = te.wFlags & 1; /* set the direction */ | |
800 | pTA->iWakeUp = 0; /* zero the wake up count */ | |
cd915200 GKH |
801 | } else |
802 | iReturn = U14ERR_NOTSET; | |
803 | spin_unlock_irq(&pdx->stagedLock); | |
804 | mutex_unlock(&pdx->io_mutex); | |
805 | } | |
806 | return iReturn == | |
807 | U14ERR_NOERROR ? (te.iSetEvent ? 1 : U14ERR_NOERROR) : iReturn; | |
2eae6bdc AS |
808 | } |
809 | ||
810 | /**************************************************************************** | |
811 | ** WaitEvent | |
812 | ** Sleep the process with a timeout waiting for an event. Returns the number | |
813 | ** of times that a block met the event condition since we last cleared it or | |
814 | ** 0 if timed out, or -ve error (bad area or not set, or signal). | |
815 | ****************************************************************************/ | |
8a938c92 | 816 | int WaitEvent(DEVICE_EXTENSION *pdx, int nArea, int msTimeOut) |
2eae6bdc | 817 | { |
cd915200 | 818 | int iReturn; |
428ed14f | 819 | if ((unsigned)nArea >= MAX_TRANSAREAS) |
cd915200 GKH |
820 | return U14ERR_BADAREA; |
821 | else { | |
822 | int iWait; | |
823 | TRANSAREA *pTA = &pdx->rTransDef[nArea]; | |
e4837704 EU |
824 | msTimeOut = (msTimeOut * HZ + 999) / 1000; /* convert timeout to jiffies */ |
825 | ||
826 | /* We cannot wait holding the mutex, but we check the flags while holding */ | |
827 | /* it. This may well be pointless as another thread could get in between */ | |
828 | /* releasing it and the wait call. However, this would have to clear the */ | |
829 | /* iWakeUp flag. However, the !pTA-bUsed may help us in this case. */ | |
830 | mutex_lock(&pdx->io_mutex); /* make sure we have no competitor */ | |
831 | if (!pTA->bUsed || !pTA->dwEventSz) /* check something to wait for... */ | |
832 | return U14ERR_NOTSET; /* ...else we do nothing */ | |
cd915200 GKH |
833 | mutex_unlock(&pdx->io_mutex); |
834 | ||
835 | if (msTimeOut) | |
836 | iWait = | |
837 | wait_event_interruptible_timeout(pTA->wqEvent, | |
838 | pTA->iWakeUp | |
839 | || !pTA->bUsed, | |
840 | msTimeOut); | |
841 | else | |
842 | iWait = | |
843 | wait_event_interruptible(pTA->wqEvent, pTA->iWakeUp | |
844 | || !pTA->bUsed); | |
845 | if (iWait) | |
e4837704 | 846 | iReturn = -ERESTARTSYS; /* oops - we have had a SIGNAL */ |
cd915200 | 847 | else |
e4837704 | 848 | iReturn = pTA->iWakeUp; /* else the wakeup count */ |
cd915200 GKH |
849 | |
850 | spin_lock_irq(&pdx->stagedLock); | |
e4837704 | 851 | pTA->iWakeUp = 0; /* clear the flag */ |
cd915200 GKH |
852 | spin_unlock_irq(&pdx->stagedLock); |
853 | } | |
854 | return iReturn; | |
2eae6bdc AS |
855 | } |
856 | ||
857 | /**************************************************************************** | |
858 | ** TestEvent | |
859 | ** Test the event to see if a WaitEvent would return immediately. Returns the | |
860 | ** number of times a block completed since the last call, or 0 if none or a | |
861 | ** negative error. | |
862 | ****************************************************************************/ | |
8a938c92 | 863 | int TestEvent(DEVICE_EXTENSION *pdx, int nArea) |
2eae6bdc | 864 | { |
cd915200 | 865 | int iReturn; |
428ed14f | 866 | if ((unsigned)nArea >= MAX_TRANSAREAS) |
cd915200 GKH |
867 | iReturn = U14ERR_BADAREA; |
868 | else { | |
869 | TRANSAREA *pTA = &pdx->rTransDef[nArea]; | |
e4837704 | 870 | mutex_lock(&pdx->io_mutex); /* make sure we have no competitor */ |
cd915200 | 871 | spin_lock_irq(&pdx->stagedLock); |
e4837704 EU |
872 | iReturn = pTA->iWakeUp; /* get wakeup count since last call */ |
873 | pTA->iWakeUp = 0; /* clear the count */ | |
cd915200 GKH |
874 | spin_unlock_irq(&pdx->stagedLock); |
875 | mutex_unlock(&pdx->io_mutex); | |
876 | } | |
877 | return iReturn; | |
2eae6bdc AS |
878 | } |
879 | ||
880 | /**************************************************************************** | |
881 | ** GetTransferInfo | |
882 | ** Puts the current state of the 1401 in a TGET_TX_BLOCK. | |
883 | *****************************************************************************/ | |
8a938c92 | 884 | int GetTransfer(DEVICE_EXTENSION *pdx, TGET_TX_BLOCK __user *pTX) |
2eae6bdc | 885 | { |
cd915200 GKH |
886 | int iReturn = U14ERR_NOERROR; |
887 | unsigned int dwIdent; | |
888 | ||
889 | mutex_lock(&pdx->io_mutex); | |
e4837704 | 890 | dwIdent = pdx->StagedId; /* area ident for last xfer */ |
cd915200 GKH |
891 | if (dwIdent >= MAX_TRANSAREAS) |
892 | iReturn = U14ERR_BADAREA; | |
893 | else { | |
e4837704 | 894 | /* Return the best information we have - we don't have physical addresses */ |
5c092f41 DN |
895 | TGET_TX_BLOCK *tx; |
896 | ||
897 | tx = kzalloc(sizeof(*tx), GFP_KERNEL); | |
898 | if (!tx) { | |
899 | mutex_unlock(&pdx->io_mutex); | |
900 | return -ENOMEM; | |
901 | } | |
902 | tx->size = pdx->rTransDef[dwIdent].dwLength; | |
903 | tx->linear = (long long)((long)pdx->rTransDef[dwIdent].lpvBuff); | |
e4837704 EU |
904 | tx->avail = GET_TX_MAXENTRIES; /* how many blocks we could return */ |
905 | tx->used = 1; /* number we actually return */ | |
5c092f41 DN |
906 | tx->entries[0].physical = |
907 | (long long)(tx->linear + pdx->StagedOffset); | |
908 | tx->entries[0].size = tx->size; | |
909 | ||
910 | if (copy_to_user(pTX, tx, sizeof(*tx))) | |
74f56714 | 911 | iReturn = -EFAULT; |
5c092f41 | 912 | kfree(tx); |
cd915200 GKH |
913 | } |
914 | mutex_unlock(&pdx->io_mutex); | |
915 | return iReturn; | |
2eae6bdc AS |
916 | } |
917 | ||
918 | /**************************************************************************** | |
919 | ** KillIO1401 | |
920 | ** | |
921 | ** Empties the host i/o buffers | |
922 | ****************************************************************************/ | |
8a938c92 | 923 | int KillIO1401(DEVICE_EXTENSION *pdx) |
2eae6bdc | 924 | { |
cd915200 GKH |
925 | dev_dbg(&pdx->interface->dev, "%s", __func__); |
926 | mutex_lock(&pdx->io_mutex); | |
927 | FlushOutBuff(pdx); | |
928 | FlushInBuff(pdx); | |
929 | mutex_unlock(&pdx->io_mutex); | |
930 | return U14ERR_NOERROR; | |
2eae6bdc AS |
931 | } |
932 | ||
933 | /**************************************************************************** | |
934 | ** BlkTransState | |
935 | ** Returns a 0 or a 1 for whether DMA is happening. No point holding a mutex | |
936 | ** for this as it only does one read. | |
937 | *****************************************************************************/ | |
8a938c92 | 938 | int BlkTransState(DEVICE_EXTENSION *pdx) |
2eae6bdc | 939 | { |
cd915200 GKH |
940 | int iReturn = pdx->dwDMAFlag != MODE_CHAR; |
941 | dev_dbg(&pdx->interface->dev, "%s = %d", __func__, iReturn); | |
942 | return iReturn; | |
2eae6bdc AS |
943 | } |
944 | ||
945 | /**************************************************************************** | |
946 | ** StateOf1401 | |
947 | ** | |
948 | ** Puts the current state of the 1401 in the Irp return buffer. | |
949 | *****************************************************************************/ | |
8a938c92 | 950 | int StateOf1401(DEVICE_EXTENSION *pdx) |
2eae6bdc | 951 | { |
cd915200 GKH |
952 | int iReturn; |
953 | mutex_lock(&pdx->io_mutex); | |
2eae6bdc | 954 | |
e4837704 | 955 | QuickCheck(pdx, false, false); /* get state up to date, no reset */ |
cd915200 | 956 | iReturn = pdx->sCurrentState; |
2eae6bdc | 957 | |
cd915200 GKH |
958 | mutex_unlock(&pdx->io_mutex); |
959 | dev_dbg(&pdx->interface->dev, "%s = %d", __func__, iReturn); | |
2eae6bdc | 960 | |
cd915200 | 961 | return iReturn; |
2eae6bdc | 962 | } |
cd915200 | 963 | |
2eae6bdc AS |
964 | /**************************************************************************** |
965 | ** StartSelfTest | |
966 | ** | |
967 | ** Initiates a self-test cycle. The assumption is that we have no interrupts | |
968 | ** active, so we should make sure that this is the case. | |
969 | *****************************************************************************/ | |
8a938c92 | 970 | int StartSelfTest(DEVICE_EXTENSION *pdx) |
2eae6bdc | 971 | { |
cd915200 GKH |
972 | int nGot; |
973 | mutex_lock(&pdx->io_mutex); | |
974 | dev_dbg(&pdx->interface->dev, "%s", __func__); | |
2eae6bdc | 975 | |
e4837704 EU |
976 | ced_draw_down(pdx); /* wait for, then kill outstanding Urbs */ |
977 | FlushInBuff(pdx); /* Clear out input buffer & pipe */ | |
978 | FlushOutBuff(pdx); /* Clear output buffer & pipe */ | |
979 | /* so things stay tidy */ | |
980 | /* ReadWrite_Cancel(pDeviceObject); */ | |
cd915200 | 981 | pdx->dwDMAFlag = MODE_CHAR; /* Clear DMA mode flags here */ |
2eae6bdc | 982 | |
6e3fe5dc SK |
983 | nGot = usb_control_msg(pdx->udev, usb_rcvctrlpipe(pdx->udev, 0), |
984 | DB_SELFTEST, (H_TO_D | VENDOR | DEVREQ), | |
985 | 0, 0, NULL, 0, HZ); /* allow 1 second timeout */ | |
e4837704 | 986 | pdx->ulSelfTestTime = jiffies + HZ * 30; /* 30 seconds into the future */ |
2eae6bdc | 987 | |
cd915200 GKH |
988 | mutex_unlock(&pdx->io_mutex); |
989 | if (nGot < 0) | |
990 | dev_err(&pdx->interface->dev, "%s err=%d", __func__, nGot); | |
991 | return nGot < 0 ? U14ERR_FAIL : U14ERR_NOERROR; | |
2eae6bdc AS |
992 | } |
993 | ||
2eae6bdc AS |
994 | /**************************************************************************** |
995 | ** CheckSelfTest | |
996 | ** | |
997 | ** Check progress of a self-test cycle | |
998 | ****************************************************************************/ | |
8a938c92 | 999 | int CheckSelfTest(DEVICE_EXTENSION *pdx, TGET_SELFTEST __user *pGST) |
2eae6bdc | 1000 | { |
cd915200 GKH |
1001 | unsigned int state, error; |
1002 | int iReturn; | |
e4837704 EU |
1003 | TGET_SELFTEST gst; /* local work space */ |
1004 | memset(&gst, 0, sizeof(gst)); /* clear out the space (sets code 0) */ | |
cd915200 GKH |
1005 | |
1006 | mutex_lock(&pdx->io_mutex); | |
1007 | ||
1008 | dev_dbg(&pdx->interface->dev, "%s", __func__); | |
1009 | iReturn = Get1401State(pdx, &state, &error); | |
e4837704 | 1010 | if (iReturn == U14ERR_NOERROR) /* Only accept zero if it happens twice */ |
cd915200 GKH |
1011 | iReturn = Get1401State(pdx, &state, &error); |
1012 | ||
e035b590 EU |
1013 | if (iReturn != U14ERR_NOERROR) { /* Self-test can cause comms errors */ |
1014 | /* so we assume still testing */ | |
cd915200 GKH |
1015 | dev_err(&pdx->interface->dev, |
1016 | "%s Get1401State=%d, assuming still testing", __func__, | |
1017 | iReturn); | |
e4837704 | 1018 | state = 0x80; /* Force still-testing, no error */ |
cd915200 GKH |
1019 | error = 0; |
1020 | iReturn = U14ERR_NOERROR; | |
1021 | } | |
1022 | ||
e035b590 | 1023 | if ((state == -1) && (error == -1)) { /* If Get1401State had problems */ |
cd915200 GKH |
1024 | dev_err(&pdx->interface->dev, |
1025 | "%s Get1401State failed, assuming still testing", | |
1026 | __func__); | |
e4837704 | 1027 | state = 0x80; /* Force still-testing, no error */ |
cd915200 GKH |
1028 | error = 0; |
1029 | } | |
1030 | ||
e035b590 EU |
1031 | if ((state & 0xFF) == 0x80) { /* If we are still in self-test */ |
1032 | if (state & 0x00FF0000) { /* Have we got an error? */ | |
e4837704 EU |
1033 | gst.code = (state & 0x00FF0000) >> 16; /* read the error code */ |
1034 | gst.x = error & 0x0000FFFF; /* Error data X */ | |
1035 | gst.y = (error & 0xFFFF0000) >> 16; /* and data Y */ | |
cd915200 GKH |
1036 | dev_dbg(&pdx->interface->dev, "Self-test error code %d", |
1037 | gst.code); | |
e035b590 | 1038 | } else { /* No error, check for timeout */ |
e4837704 | 1039 | unsigned long ulNow = jiffies; /* get current time */ |
cd915200 | 1040 | if (time_after(ulNow, pdx->ulSelfTestTime)) { |
e4837704 | 1041 | gst.code = -2; /* Flag the timeout */ |
cd915200 GKH |
1042 | dev_dbg(&pdx->interface->dev, |
1043 | "Self-test timed-out"); | |
1044 | } else | |
1045 | dev_dbg(&pdx->interface->dev, | |
1046 | "Self-test on-going"); | |
1047 | } | |
1048 | } else { | |
e4837704 | 1049 | gst.code = -1; /* Flag the test is done */ |
cd915200 GKH |
1050 | dev_dbg(&pdx->interface->dev, "Self-test done"); |
1051 | } | |
1052 | ||
e035b590 EU |
1053 | if (gst.code < 0) { /* If we have a problem or finished */ |
1054 | /* If using the 2890 we should reset properly */ | |
cd915200 | 1055 | if ((pdx->nPipes == 4) && (pdx->s1401Type <= TYPEPOWER)) |
e4837704 | 1056 | Is1401(pdx); /* Get 1401 reset and OK */ |
cd915200 | 1057 | else |
e4837704 | 1058 | QuickCheck(pdx, true, true); /* Otherwise check without reset unless problems */ |
cd915200 GKH |
1059 | } |
1060 | mutex_unlock(&pdx->io_mutex); | |
1061 | ||
74f56714 GKH |
1062 | if (copy_to_user(pGST, &gst, sizeof(gst))) |
1063 | return -EFAULT; | |
1064 | ||
cd915200 | 1065 | return iReturn; |
2eae6bdc AS |
1066 | } |
1067 | ||
1068 | /**************************************************************************** | |
1069 | ** TypeOf1401 | |
1070 | ** | |
1071 | ** Returns code for standard, plus, micro1401, power1401 or none | |
1072 | ****************************************************************************/ | |
8a938c92 | 1073 | int TypeOf1401(DEVICE_EXTENSION *pdx) |
2eae6bdc | 1074 | { |
cd915200 GKH |
1075 | int iReturn = TYPEUNKNOWN; |
1076 | mutex_lock(&pdx->io_mutex); | |
1077 | dev_dbg(&pdx->interface->dev, "%s", __func__); | |
1078 | ||
1079 | switch (pdx->s1401Type) { | |
1080 | case TYPE1401: | |
1081 | iReturn = U14ERR_STD; | |
e4837704 | 1082 | break; /* Handle these types directly */ |
cd915200 GKH |
1083 | case TYPEPLUS: |
1084 | iReturn = U14ERR_PLUS; | |
1085 | break; | |
1086 | case TYPEU1401: | |
1087 | iReturn = U14ERR_U1401; | |
1088 | break; | |
1089 | default: | |
1090 | if ((pdx->s1401Type >= TYPEPOWER) && (pdx->s1401Type <= 25)) | |
e4837704 EU |
1091 | iReturn = pdx->s1401Type + 4; /* We can calculate types */ |
1092 | else /* for up-coming 1401 designs */ | |
1093 | iReturn = TYPEUNKNOWN; /* Don't know or not there */ | |
cd915200 GKH |
1094 | } |
1095 | dev_dbg(&pdx->interface->dev, "%s %d", __func__, iReturn); | |
1096 | mutex_unlock(&pdx->io_mutex); | |
1097 | ||
1098 | return iReturn; | |
2eae6bdc AS |
1099 | } |
1100 | ||
1101 | /**************************************************************************** | |
1102 | ** TransferFlags | |
1103 | ** | |
1104 | ** Returns flags on block transfer abilities | |
1105 | ****************************************************************************/ | |
8a938c92 | 1106 | int TransferFlags(DEVICE_EXTENSION *pdx) |
2eae6bdc | 1107 | { |
e4837704 EU |
1108 | int iReturn = U14TF_MULTIA | U14TF_DIAG | /* we always have multiple DMA area */ |
1109 | U14TF_NOTIFY | U14TF_CIRCTH; /* diagnostics, notify and circular */ | |
cd915200 GKH |
1110 | dev_dbg(&pdx->interface->dev, "%s", __func__); |
1111 | mutex_lock(&pdx->io_mutex); | |
e4837704 | 1112 | if (pdx->bIsUSB2) /* Set flag for USB2 if appropriate */ |
cd915200 GKH |
1113 | iReturn |= U14TF_USB2; |
1114 | mutex_unlock(&pdx->io_mutex); | |
1115 | ||
1116 | return iReturn; | |
2eae6bdc AS |
1117 | } |
1118 | ||
1119 | /*************************************************************************** | |
1120 | ** DbgCmd1401 | |
1121 | ** Issues a debug\diagnostic command to the 1401 along with a 32-bit datum | |
1122 | ** This is a utility command used for dbg operations. | |
1123 | */ | |
8a938c92 | 1124 | static int DbgCmd1401(DEVICE_EXTENSION *pdx, unsigned char cmd, |
cd915200 | 1125 | unsigned int data) |
2eae6bdc | 1126 | { |
cd915200 GKH |
1127 | int iReturn; |
1128 | dev_dbg(&pdx->interface->dev, "%s entry", __func__); | |
6e3fe5dc SK |
1129 | iReturn = usb_control_msg(pdx->udev, usb_sndctrlpipe(pdx->udev, 0), cmd, |
1130 | (H_TO_D | VENDOR | DEVREQ), | |
1131 | (unsigned short)data, | |
1132 | (unsigned short)(data >> 16), NULL, 0, HZ); | |
1133 | /* allow 1 second timeout */ | |
cd915200 GKH |
1134 | if (iReturn < 0) |
1135 | dev_err(&pdx->interface->dev, "%s fail code=%d", __func__, | |
1136 | iReturn); | |
1137 | ||
1138 | return iReturn; | |
2eae6bdc AS |
1139 | } |
1140 | ||
1141 | /**************************************************************************** | |
1142 | ** DbgPeek | |
1143 | ** | |
1144 | ** Execute the diagnostic peek operation. Uses address, width and repeats. | |
1145 | ****************************************************************************/ | |
8a938c92 | 1146 | int DbgPeek(DEVICE_EXTENSION *pdx, TDBGBLOCK __user *pDB) |
2eae6bdc | 1147 | { |
cd915200 GKH |
1148 | int iReturn; |
1149 | TDBGBLOCK db; | |
74f56714 GKH |
1150 | |
1151 | if (copy_from_user(&db, pDB, sizeof(db))) | |
1152 | return -EFAULT; | |
cd915200 GKH |
1153 | |
1154 | mutex_lock(&pdx->io_mutex); | |
1155 | dev_dbg(&pdx->interface->dev, "%s @ %08x", __func__, db.iAddr); | |
1156 | ||
1157 | iReturn = DbgCmd1401(pdx, DB_SETADD, db.iAddr); | |
1158 | if (iReturn == U14ERR_NOERROR) | |
1159 | iReturn = DbgCmd1401(pdx, DB_WIDTH, db.iWidth); | |
1160 | if (iReturn == U14ERR_NOERROR) | |
1161 | iReturn = DbgCmd1401(pdx, DB_REPEATS, db.iRepeats); | |
1162 | if (iReturn == U14ERR_NOERROR) | |
1163 | iReturn = DbgCmd1401(pdx, DB_PEEK, 0); | |
1164 | mutex_unlock(&pdx->io_mutex); | |
1165 | ||
1166 | return iReturn; | |
2eae6bdc AS |
1167 | } |
1168 | ||
2eae6bdc AS |
1169 | /**************************************************************************** |
1170 | ** DbgPoke | |
1171 | ** | |
1172 | ** Execute the diagnostic poke operation. Parameters are in the CSBLOCK struct | |
1173 | ** in order address, size, repeats and value to poke. | |
1174 | ****************************************************************************/ | |
8a938c92 | 1175 | int DbgPoke(DEVICE_EXTENSION *pdx, TDBGBLOCK __user *pDB) |
2eae6bdc | 1176 | { |
cd915200 GKH |
1177 | int iReturn; |
1178 | TDBGBLOCK db; | |
74f56714 GKH |
1179 | |
1180 | if (copy_from_user(&db, pDB, sizeof(db))) | |
1181 | return -EFAULT; | |
cd915200 GKH |
1182 | |
1183 | mutex_lock(&pdx->io_mutex); | |
1184 | dev_dbg(&pdx->interface->dev, "%s @ %08x", __func__, db.iAddr); | |
1185 | ||
1186 | iReturn = DbgCmd1401(pdx, DB_SETADD, db.iAddr); | |
1187 | if (iReturn == U14ERR_NOERROR) | |
1188 | iReturn = DbgCmd1401(pdx, DB_WIDTH, db.iWidth); | |
1189 | if (iReturn == U14ERR_NOERROR) | |
1190 | iReturn = DbgCmd1401(pdx, DB_REPEATS, db.iRepeats); | |
1191 | if (iReturn == U14ERR_NOERROR) | |
1192 | iReturn = DbgCmd1401(pdx, DB_POKE, db.iData); | |
1193 | mutex_unlock(&pdx->io_mutex); | |
1194 | ||
1195 | return iReturn; | |
2eae6bdc AS |
1196 | } |
1197 | ||
2eae6bdc AS |
1198 | /**************************************************************************** |
1199 | ** DbgRampData | |
1200 | ** | |
1201 | ** Execute the diagnostic ramp data operation. Parameters are in the CSBLOCK struct | |
1202 | ** in order address, default, enable mask, size and repeats. | |
1203 | ****************************************************************************/ | |
8a938c92 | 1204 | int DbgRampData(DEVICE_EXTENSION *pdx, TDBGBLOCK __user *pDB) |
2eae6bdc | 1205 | { |
cd915200 GKH |
1206 | int iReturn; |
1207 | TDBGBLOCK db; | |
74f56714 GKH |
1208 | |
1209 | if (copy_from_user(&db, pDB, sizeof(db))) | |
1210 | return -EFAULT; | |
cd915200 GKH |
1211 | |
1212 | mutex_lock(&pdx->io_mutex); | |
1213 | dev_dbg(&pdx->interface->dev, "%s @ %08x", __func__, db.iAddr); | |
1214 | ||
1215 | iReturn = DbgCmd1401(pdx, DB_SETADD, db.iAddr); | |
1216 | if (iReturn == U14ERR_NOERROR) | |
1217 | iReturn = DbgCmd1401(pdx, DB_SETDEF, db.iDefault); | |
1218 | if (iReturn == U14ERR_NOERROR) | |
1219 | iReturn = DbgCmd1401(pdx, DB_SETMASK, db.iMask); | |
1220 | if (iReturn == U14ERR_NOERROR) | |
1221 | iReturn = DbgCmd1401(pdx, DB_WIDTH, db.iWidth); | |
1222 | if (iReturn == U14ERR_NOERROR) | |
1223 | iReturn = DbgCmd1401(pdx, DB_REPEATS, db.iRepeats); | |
1224 | if (iReturn == U14ERR_NOERROR) | |
1225 | iReturn = DbgCmd1401(pdx, DB_RAMPD, 0); | |
1226 | mutex_unlock(&pdx->io_mutex); | |
1227 | ||
1228 | return iReturn; | |
2eae6bdc AS |
1229 | } |
1230 | ||
2eae6bdc AS |
1231 | /**************************************************************************** |
1232 | ** DbgRampAddr | |
1233 | ** | |
1234 | ** Execute the diagnostic ramp address operation | |
1235 | ****************************************************************************/ | |
8a938c92 | 1236 | int DbgRampAddr(DEVICE_EXTENSION *pdx, TDBGBLOCK __user *pDB) |
2eae6bdc | 1237 | { |
cd915200 GKH |
1238 | int iReturn; |
1239 | TDBGBLOCK db; | |
74f56714 GKH |
1240 | |
1241 | if (copy_from_user(&db, pDB, sizeof(db))) | |
1242 | return -EFAULT; | |
cd915200 GKH |
1243 | |
1244 | mutex_lock(&pdx->io_mutex); | |
1245 | dev_dbg(&pdx->interface->dev, "%s", __func__); | |
1246 | ||
1247 | iReturn = DbgCmd1401(pdx, DB_SETDEF, db.iDefault); | |
1248 | if (iReturn == U14ERR_NOERROR) | |
1249 | iReturn = DbgCmd1401(pdx, DB_SETMASK, db.iMask); | |
1250 | if (iReturn == U14ERR_NOERROR) | |
1251 | iReturn = DbgCmd1401(pdx, DB_WIDTH, db.iWidth); | |
1252 | if (iReturn == U14ERR_NOERROR) | |
1253 | iReturn = DbgCmd1401(pdx, DB_REPEATS, db.iRepeats); | |
1254 | if (iReturn == U14ERR_NOERROR) | |
1255 | iReturn = DbgCmd1401(pdx, DB_RAMPA, 0); | |
1256 | mutex_unlock(&pdx->io_mutex); | |
1257 | ||
1258 | return iReturn; | |
2eae6bdc AS |
1259 | } |
1260 | ||
2eae6bdc AS |
1261 | /**************************************************************************** |
1262 | ** DbgGetData | |
1263 | ** | |
1264 | ** Retrieve the data resulting from the last debug Peek operation | |
1265 | ****************************************************************************/ | |
8a938c92 | 1266 | int DbgGetData(DEVICE_EXTENSION *pdx, TDBGBLOCK __user *pDB) |
2eae6bdc | 1267 | { |
cd915200 GKH |
1268 | int iReturn; |
1269 | TDBGBLOCK db; | |
e4837704 | 1270 | memset(&db, 0, sizeof(db)); /* fill returned block with 0s */ |
cd915200 GKH |
1271 | |
1272 | mutex_lock(&pdx->io_mutex); | |
1273 | dev_dbg(&pdx->interface->dev, "%s", __func__); | |
1274 | ||
e4837704 | 1275 | /* Read back the last peeked value from the 1401. */ |
cd915200 GKH |
1276 | iReturn = usb_control_msg(pdx->udev, usb_rcvctrlpipe(pdx->udev, 0), |
1277 | DB_DATA, (D_TO_H | VENDOR | DEVREQ), 0, 0, | |
1278 | &db.iData, sizeof(db.iData), HZ); | |
1279 | if (iReturn == sizeof(db.iData)) { | |
74f56714 GKH |
1280 | if (copy_to_user(pDB, &db, sizeof(db))) |
1281 | iReturn = -EFAULT; | |
1282 | else | |
1283 | iReturn = U14ERR_NOERROR; | |
cd915200 GKH |
1284 | } else |
1285 | dev_err(&pdx->interface->dev, "%s failed, code %d", __func__, | |
1286 | iReturn); | |
1287 | ||
1288 | mutex_unlock(&pdx->io_mutex); | |
1289 | ||
1290 | return iReturn; | |
2eae6bdc AS |
1291 | } |
1292 | ||
1293 | /**************************************************************************** | |
1294 | ** DbgStopLoop | |
1295 | ** | |
1296 | ** Stop any never-ending debug loop, we just call Get1401State for USB | |
1297 | ** | |
1298 | ****************************************************************************/ | |
8a938c92 | 1299 | int DbgStopLoop(DEVICE_EXTENSION *pdx) |
2eae6bdc | 1300 | { |
cd915200 GKH |
1301 | int iReturn; |
1302 | unsigned int uState, uErr; | |
2eae6bdc | 1303 | |
cd915200 GKH |
1304 | mutex_lock(&pdx->io_mutex); |
1305 | dev_dbg(&pdx->interface->dev, "%s", __func__); | |
1306 | iReturn = Get1401State(pdx, &uState, &uErr); | |
1307 | mutex_unlock(&pdx->io_mutex); | |
2eae6bdc | 1308 | |
cd915200 | 1309 | return iReturn; |
2eae6bdc AS |
1310 | } |
1311 | ||
2eae6bdc AS |
1312 | /**************************************************************************** |
1313 | ** SetCircular | |
1314 | ** | |
1315 | ** Sets up a transfer area record for circular transfers. If the area is | |
1316 | ** already set, we attempt to unset it. Unsetting will fail if the area is | |
1317 | ** booked and a transfer to that area is in progress. Otherwise, we will | |
1318 | ** release the area and re-assign it. | |
1319 | ****************************************************************************/ | |
8a938c92 | 1320 | int SetCircular(DEVICE_EXTENSION *pdx, TRANSFERDESC __user *pTD) |
2eae6bdc | 1321 | { |
cd915200 GKH |
1322 | int iReturn; |
1323 | bool bToHost; | |
1324 | TRANSFERDESC td; | |
74f56714 GKH |
1325 | |
1326 | if (copy_from_user(&td, pTD, sizeof(td))) | |
1327 | return -EFAULT; | |
1328 | ||
cd915200 GKH |
1329 | mutex_lock(&pdx->io_mutex); |
1330 | dev_dbg(&pdx->interface->dev, "%s area:%d, size:%08x", __func__, | |
1331 | td.wAreaNum, td.dwLength); | |
e4837704 | 1332 | bToHost = td.eSize != 0; /* this is used as the tohost flag */ |
cd915200 | 1333 | |
e4837704 EU |
1334 | /* The strange cast is done so that we don't get warnings in 32-bit linux about the size of the */ |
1335 | /* pointer. The pointer is always passed as a 64-bit object so that we don't have problems using */ | |
1336 | /* a 32-bit program on a 64-bit system. unsigned long is 64-bits on a 64-bit system. */ | |
cd915200 GKH |
1337 | iReturn = |
1338 | SetArea(pdx, td.wAreaNum, | |
1339 | (char __user *)((unsigned long)td.lpvBuff), td.dwLength, | |
1340 | true, bToHost); | |
1341 | mutex_unlock(&pdx->io_mutex); | |
1342 | return iReturn; | |
2eae6bdc AS |
1343 | } |
1344 | ||
1345 | /**************************************************************************** | |
1346 | ** GetCircBlock | |
1347 | ** | |
1348 | ** Return the next available block of circularly-transferred data. | |
1349 | ****************************************************************************/ | |
8a938c92 | 1350 | int GetCircBlock(DEVICE_EXTENSION *pdx, TCIRCBLOCK __user *pCB) |
2eae6bdc | 1351 | { |
cd915200 GKH |
1352 | int iReturn = U14ERR_NOERROR; |
1353 | unsigned int nArea; | |
1354 | TCIRCBLOCK cb; | |
74f56714 | 1355 | |
cd915200 | 1356 | dev_dbg(&pdx->interface->dev, "%s", __func__); |
74f56714 GKH |
1357 | |
1358 | if (copy_from_user(&cb, pCB, sizeof(cb))) | |
1359 | return -EFAULT; | |
1360 | ||
cd915200 GKH |
1361 | mutex_lock(&pdx->io_mutex); |
1362 | ||
e4837704 EU |
1363 | nArea = cb.nArea; /* Retrieve parameters first */ |
1364 | cb.dwOffset = 0; /* set default result (nothing) */ | |
cd915200 GKH |
1365 | cb.dwSize = 0; |
1366 | ||
e035b590 | 1367 | if (nArea < MAX_TRANSAREAS) { /* The area number must be OK */ |
e4837704 EU |
1368 | TRANSAREA *pArea = &pdx->rTransDef[nArea]; /* Pointer to relevant info */ |
1369 | spin_lock_irq(&pdx->stagedLock); /* Lock others out */ | |
cd915200 | 1370 | |
e4837704 | 1371 | if ((pArea->bUsed) && (pArea->bCircular) && /* Must be circular area */ |
e035b590 EU |
1372 | (pArea->bCircToHost)) { /* For now at least must be to host */ |
1373 | if (pArea->aBlocks[0].dwSize > 0) { /* Got anything? */ | |
cd915200 GKH |
1374 | cb.dwOffset = pArea->aBlocks[0].dwOffset; |
1375 | cb.dwSize = pArea->aBlocks[0].dwSize; | |
1376 | dev_dbg(&pdx->interface->dev, | |
1377 | "%s return block 0: %d bytes at %d", | |
1378 | __func__, cb.dwSize, cb.dwOffset); | |
1379 | } | |
1380 | } else | |
1381 | iReturn = U14ERR_NOTSET; | |
1382 | ||
1383 | spin_unlock_irq(&pdx->stagedLock); | |
1384 | } else | |
1385 | iReturn = U14ERR_BADAREA; | |
1386 | ||
74f56714 GKH |
1387 | if (copy_to_user(pCB, &cb, sizeof(cb))) |
1388 | iReturn = -EFAULT; | |
1389 | ||
cd915200 GKH |
1390 | mutex_unlock(&pdx->io_mutex); |
1391 | return iReturn; | |
2eae6bdc AS |
1392 | } |
1393 | ||
2eae6bdc AS |
1394 | /**************************************************************************** |
1395 | ** FreeCircBlock | |
1396 | ** | |
1397 | ** Frees a block of circularly-transferred data and returns the next one. | |
1398 | ****************************************************************************/ | |
8a938c92 | 1399 | int FreeCircBlock(DEVICE_EXTENSION *pdx, TCIRCBLOCK __user *pCB) |
2eae6bdc | 1400 | { |
cd915200 GKH |
1401 | int iReturn = U14ERR_NOERROR; |
1402 | unsigned int nArea, uStart, uSize; | |
1403 | TCIRCBLOCK cb; | |
74f56714 | 1404 | |
cd915200 | 1405 | dev_dbg(&pdx->interface->dev, "%s", __func__); |
74f56714 GKH |
1406 | |
1407 | if (copy_from_user(&cb, pCB, sizeof(cb))) | |
1408 | return -EFAULT; | |
1409 | ||
cd915200 GKH |
1410 | mutex_lock(&pdx->io_mutex); |
1411 | ||
e4837704 | 1412 | nArea = cb.nArea; /* Retrieve parameters first */ |
cd915200 GKH |
1413 | uStart = cb.dwOffset; |
1414 | uSize = cb.dwSize; | |
e4837704 | 1415 | cb.dwOffset = 0; /* then set default result (nothing) */ |
cd915200 GKH |
1416 | cb.dwSize = 0; |
1417 | ||
e035b590 | 1418 | if (nArea < MAX_TRANSAREAS) { /* The area number must be OK */ |
e4837704 EU |
1419 | TRANSAREA *pArea = &pdx->rTransDef[nArea]; /* Pointer to relevant info */ |
1420 | spin_lock_irq(&pdx->stagedLock); /* Lock others out */ | |
cd915200 | 1421 | |
e4837704 | 1422 | if ((pArea->bUsed) && (pArea->bCircular) && /* Must be circular area */ |
e035b590 | 1423 | (pArea->bCircToHost)) { /* For now at least must be to host */ |
cd915200 GKH |
1424 | bool bWaiting = false; |
1425 | ||
e4837704 | 1426 | if ((pArea->aBlocks[0].dwSize >= uSize) && /* Got anything? */ |
e035b590 | 1427 | (pArea->aBlocks[0].dwOffset == uStart)) { /* Must be legal data */ |
cd915200 GKH |
1428 | pArea->aBlocks[0].dwSize -= uSize; |
1429 | pArea->aBlocks[0].dwOffset += uSize; | |
e035b590 EU |
1430 | if (pArea->aBlocks[0].dwSize == 0) { /* Have we emptied this block? */ |
1431 | if (pArea->aBlocks[1].dwSize) { /* Is there a second block? */ | |
e4837704 EU |
1432 | pArea->aBlocks[0] = pArea->aBlocks[1]; /* Copy down block 2 data */ |
1433 | pArea->aBlocks[1].dwSize = 0; /* and mark the second block as unused */ | |
cd915200 GKH |
1434 | pArea->aBlocks[1].dwOffset = 0; |
1435 | } else | |
1436 | pArea->aBlocks[0].dwOffset = 0; | |
1437 | } | |
1438 | ||
1439 | dev_dbg(&pdx->interface->dev, | |
1440 | "%s free %d bytes at %d, return %d bytes at %d, wait=%d", | |
1441 | __func__, uSize, uStart, | |
1442 | pArea->aBlocks[0].dwSize, | |
1443 | pArea->aBlocks[0].dwOffset, | |
1444 | pdx->bXFerWaiting); | |
1445 | ||
e4837704 | 1446 | /* Return the next available block of memory as well */ |
e035b590 | 1447 | if (pArea->aBlocks[0].dwSize > 0) { /* Got anything? */ |
cd915200 GKH |
1448 | cb.dwOffset = |
1449 | pArea->aBlocks[0].dwOffset; | |
1450 | cb.dwSize = pArea->aBlocks[0].dwSize; | |
1451 | } | |
1452 | ||
1453 | bWaiting = pdx->bXFerWaiting; | |
1454 | if (bWaiting && pdx->bStagedUrbPending) { | |
1455 | dev_err(&pdx->interface->dev, | |
1456 | "%s ERROR: waiting xfer and staged Urb pending!", | |
1457 | __func__); | |
1458 | bWaiting = false; | |
1459 | } | |
1460 | } else { | |
1461 | dev_err(&pdx->interface->dev, | |
1462 | "%s ERROR: freeing %d bytes at %d, block 0 is %d bytes at %d", | |
1463 | __func__, uSize, uStart, | |
1464 | pArea->aBlocks[0].dwSize, | |
1465 | pArea->aBlocks[0].dwOffset); | |
1466 | iReturn = U14ERR_NOMEMORY; | |
1467 | } | |
1468 | ||
e4837704 | 1469 | /* If we have one, kick off pending transfer */ |
e035b590 | 1470 | if (bWaiting) { /* Got a block xfer waiting? */ |
cd915200 GKH |
1471 | int RWMStat = |
1472 | ReadWriteMem(pdx, !pdx->rDMAInfo.bOutWard, | |
1473 | pdx->rDMAInfo.wIdent, | |
1474 | pdx->rDMAInfo.dwOffset, | |
1475 | pdx->rDMAInfo.dwSize); | |
1476 | if (RWMStat != U14ERR_NOERROR) | |
1477 | dev_err(&pdx->interface->dev, | |
1478 | "%s rw setup failed %d", | |
1479 | __func__, RWMStat); | |
1480 | } | |
1481 | } else | |
1482 | iReturn = U14ERR_NOTSET; | |
1483 | ||
1484 | spin_unlock_irq(&pdx->stagedLock); | |
1485 | } else | |
1486 | iReturn = U14ERR_BADAREA; | |
1487 | ||
74f56714 | 1488 | if (copy_to_user(pCB, &cb, sizeof(cb))) |
a5e0f69c | 1489 | iReturn = -EFAULT; |
74f56714 | 1490 | |
cd915200 GKH |
1491 | mutex_unlock(&pdx->io_mutex); |
1492 | return iReturn; | |
2eae6bdc | 1493 | } |